An evaluation of the effectiveness of the treatment of food industry and municipal wastewaters
2002
Ondrasovicova, O. | Vargova, M. | Ondrasovic, M. | Para, L. (University of Veterinary Medicine, Kosice (Slovak Republic))
The study investigated and evaluated the effectiveness of an aerobic mechanical-biological wastewater treatment plant (WTP) with preliminary denitrification designed for the combined treatment of sewage and wastewaters produced by a milk processing plant. Pollution of raw wastewater (influent) reached 64 800 population equivalents (PE). The removal of organic substances expressed as chemical oxygen demand (CODCr) reached 75-92.0% and biochemical oxygen demand (BOD5) ranged from 73.5 to 96.5% which indicated the effectiveness for these two parameters. The effectiveness of the removal of ammonium nitrogen varied from 69.4 to 100%. The limit for ammonia nitrogen in water discharged to the recipient (10 mg/l) was not exceeded in any sample during the 12 months of our investigation. The presented data point to the importance of predenitrification in biological treatment of wastewaters
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